I think some of mine over time have become more robust in resisting rust. But that may be hope triumphing more than fact.
In the past, when each clump finished flowering, I always cleaned them up by removing leaves. At the moment I am about to start the regimen recommended to me by Michelle elsewhere (and also mentioned in this thread). I am also starting a better fertilising regimen beginning with Epsom's Salts this weekend.
I see elsewhere that organic milk to 10 parts water has been recommended as a fungicide. I haven't tried it.
http://www.abc.net.au/gardenin...
